U.S. Geological Survey 2006 vector digital data Scientific Investigations Report 2006-5129 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir-06-5129_formation_tops_point Watts, K.R. 2006 document Scientific Investigations Report 2006-5129 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sir/2006/5129/ This dataset consists of reported depths to and calculated altitudes of selected geologic contacts, and calculated apparent thicknesses of selected hydrostratigraphic units, in the Raton Basin, Huerfano and Las Animas Counties, southeastern Colorado. This dataset consists of reported depths to and calculated altitudes of selected geologic contacts, and calculated apparent thicknesses of selected hydrostratigraphic units, in the Raton Basin, Huerfano and Las Animas Counties, southeastern Colorado. It primarily was developed from data compiled from the database of the Colorado Oil and Gas Conservation Commission but also includes the altitudes of selected contact surfaces that were interpolated from the geologic map of the Trinidad quadrangle (Johnson, 1969). These data were used to prepare maps of the altitude of the bottom and top of the Trinidad Sandstone, and the tops of the Veremjo and Raton Formations, and of the apparent thicknesses of the Trinidad Sandstone and Vermejo and Raton Formations. This dataset includes hydrostratigraphic data for Huerfano County and Las Animas Counties, Colorado; however associated structural and thickness contours derived from these data are limited to the part of the Raton Basin in Las Animas County, Colorado. 2006 publication date Complete None planned -105.143520 -104.221215 37.662400 36.989360 ISO 19115 Topic Category inlandWaters geoscientificInformation Geographic Names Information System (GNIS) Huerfano County Las Animas County Colorado Geologic Names Lexicon (GEOLEX) Pierre Shale Trinidad Sandstone Vermejo Formation Raton Formation Poison Canyon Formation Cuchara Formation Dakota, Purgatoire, Morrison, Ralston Creek, and Entrada Formations in southeastern Colorado (Green, 1992) Pierre Shale, Niobrara, and Carlile, Greenhorn, and Graneros Formations, undivided (Green, 1992) Vermejo Formation (shale, sandstone, and major coal beds) and Trinidad Sandstone (Green, 1992) Modern alluvium (Green, 1992) None. None. U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

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Reston VA 20192 USA 1-888-275-8747 (1888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+sir-06-5129_formation_tops_point Compilation of this data set and associated metadata was done in cooperation with the Colorado Water Conservation Board. Technical review of this data set and metadata was provided by Steve Char of the U.S. Geological Survey. Public Unclassified None Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_alt_bottom_trinidad_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_alt_top_raton_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_alt_top_trinidad_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_alt_top_vermejo_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_alt_water_table_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_cogcc_production_point U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_cogcc_wells_point U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_depth_bottom_trinidad_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_depth_top_raton_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_depth_top_trinidad_con U.S> Geological Survey 2006 tabular digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_depth_top_vermejo_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_depth_water_table_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_seo_wells_point U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_thickness_raton_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_thickness_trinidad_con U.S. Geological Survey 2006 vector digital data http://water.usgs.gov/lookup/getspatial?sir-06-5129_thickness_vermejo_con Johnson, R.B. 1969 document U.S. Geological Survey Miscellaneous Investigations Series Map I-558, scale 1:250,000, reprinted in 1983 http://pubs.er.usgs.gov/usgspubs/i/i558 Green, G.N. 1992 vector digital data U.S. Geological Survey Open-File Report 92-507 Part A. Documentation Part B. Common files Part C. Explanation sheet database Part D-O. Geospatial data in ARC/INFO format http://pubs.usgs.gov/of/1992/ofr-92-0507/ Data were validated with live queries of the Colorado Oil and Gas Conservation on-line database at URL http://www.oil-gas.state.co.us/COGIS/LiveQuery.html, on a well by well basis. Reported depths to selected hydrostratigraphic units were screened to assure stratigraphic succession. Reported altitudes of land surface at oil and gas wells were compared with interpolated altitudes of land surface at the oil and gas wells. Interpolated altitudes of the land surface at oil and gas wells were based on the National Elevation Dataset (NED), generally at resolution of one-third Arc-second. If the reported and interpolated land-surface altitude of oil and gas wells differed by more than 25 feet, the hydrostratigraphic data were not used in geostatistical models of the tops of the Trinidad Sandstone and Raton Formation or of the apparent thicknesses of the Trinidad Sandstone and Vermejo Formation. This dataset includes reported depths to and computed altitudes of contact surfaces of selected hydrostratigraphic units, including: the Cuchara, Poison Canyon, Raton and Vermejo Formations, Trinidad Sandstone, and Pierre Shale, in Huerfano and Las Animas Counties, Colorado. This dataset also includes calculated apparent thicknesses of selected hydrostratigraphic units. The dataset is inclusive of data available on and before December 31, 2005. Compiled reported depths to tops and bottoms of selected formations (hydrostratigraphic units), on a well-by-well basis, into a table in an Environmental Systems Research, Inc. (ESRI) personal geodatabase, from live queries of the Colorado Oil and Gas Conservation Commission database (http://www.oil-gas.state.co.us/cogis/FacilitySearch.asp). 20051231 Joined the personal geodatabase table to the shapefile sir-06-5129_cogcc_wells_point, based on the LINK_FLD attribute. Saved selected attributes to this shapefile, sir-06-5129_formation_tops_point. 20051231 Compiled depths to selected hydrostratigraphic units from the U.S. Geological Survey, National Water Information System (NWIS), Ground-Water Site Inventory, and appended the data to the shapefile sir-06-5129_formation_tops_point. 20051231 Interpolated latitude and longitude coordinates for mapped geologic contacts (Johnson, 1969) of selected hydrostratigraphic units, where the contacts intercepted selected topographic contours, and appended the data to the shapefile sir-06-5129_formation_tops_point. 20051231 Interpolated an estimated ground-surface altitude (attribute datum) to the data points based on raster data for the National Elevation Dataset (NED), at a one-third Arc-second resolution, using the ESRI ArcGIS Spatial Analyst Tools Extraction command Extract Values to Points. 20060131 Calculated the difference (attribute datum_err) between report altitude of the land surface (attribute Lsd_rpt) and the interpolated land-surface altitude (attribute datum). Calculated the altitudes of contact surfaces of selected hydrostratigraphic units. 20060131 Joined surface geologic-unit codes to the points in sir-06-5129_formation_tops_point, attribute Geo500, based on geographic location of the data points and the Digital Geologic map of Colorado (Green, 1992). 20060131 Calculated the altitudes of the tops of the Cuchara Formation (attribute aTcu), Poison Canyon Formation (attribute aTpc), Raton Formation( attribute aTKr), Vermejo Formation (attribute aKv), Trinidad Sandstone (attribute aKt), and Pierre Shale (attribute aKp), based on reported depths to the tops of the hydrostratigraphic units (attributes dTcu. dTpc, dTKr, dKv, dKt, and dKp) and the interpolated altitude of the land surface (attribute datum). 20060131 Calculated or assigned apparent thickness of the Poison Canyon Formation (attribute isoTpc), Raton Formation (attribute isoTKr), Vermejo Formation (attribute isoKv), and Trinidad Sandstone (attribute isoKt) by subtracting reported depths to the formations. Thickness were calculated by subtraction of (non-zero) formation depths, for example isoTpc = dTKr - dTpc. 20060131 Added "yes" to flags to data from oil and gas wells, where the absolute value of the attribute datum_err was less than or equal to 25 and the value meet logical tests. The hydrostratigraphic data were used in the geostatistical models of the altitude of the top of the Raton Formation (attribute aTKr_flag), the altitude of the top of the Trinidad Sandstone (attribute aKt_flag), the apparent thickness of the Raton Formation (Attribute isoTKr), and the apparent thickness of the Trinidad Sandstone (attribute aKp), only when the flags value was "yes". 20060131 Vector Entity point 1552 Albers Conical Equal Area 37.500000 40.500000 -105.500000 37.000000 0.000000 0.000000 coordinate pair 0.000128 0.000128 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 sir-06-5129_formation_tops_point Depths to and altitudes of tops of, and apparent thicknesses of selected hydrostratigraphic units in the Raton Basin, Huerfano and Las Animas Counties, Colorado USGS FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. LINK_FLD Attribute used in geospatial database as a keyfield: for oil and gas wells, a number based on the API well number; for sites from the USGS Ground-Water Site Inventory, a 15-digit USGS site identification number; or for outcrops, an alpha-numeric code for hydrostratigraphic contact that was interpolated from the geologic map of the Trinidad quadrangle (Johnson, 1969). USGS XP Contact of Trinidad Sandstone with Pierre Shale USGS XTSS Contact of Trinidad Sandstone with Vermejo Formation USGS XVRMJ Contact of Veremjo Formation with Raton Formation USGS XTKR Contact of Raton Formation with Poison Canyon Formation USGS 370733104394201 to 372922104445801 GWSI site identification number USGS 05506257 to 07107897 Number based on API_number with leading "05" and hyphens within series removed USGS Source Code indicating the source of hydrostratigraphic data USGS cogcc On-line database of the Colorado Oil and Gas Conservation Commission USGS gwsi Ground Water Site Inventory USGS i558 Altitude of hydrostratigraphic contact that was interpolated from Johnson (1969) USGS Lsd_rpt Reported land-surface altitude of oil and gas well. Value of -9999 indicates that value was not calculated. USGS -9999 Altitude not reported or reported altitude was not within acceptable range for location USGS 6154.8 to 10000 Range of reported land-surface altitudes at oil and gas wells or estimated land-surface altitude from geologic maps USGS datum Interpolated land-surface altitude from National Eelvation Dataset (NED) USGS 6035.23 10251.4 feet, North American Vertical Datum 1988 (NAVD 88) datum_err Difference between interpolated and reported land-surface altitude of land surface (datum) and reported altitudes (datum_err = datum - Lsd_rpt). USGS -9999 Difference in interpolated and reported land-surface altitudes not calculated USGS -432.11 to 928.76 Range of calculated differences, in feet, between interpolated and reported land-surface altitudes (datum_err = datum - Lsd_rpt) USGS Geo500 Surface geologic unit at well location from Green (1992) USGS KJde Dakota, Purgatoire, Morrison, Ralston Creek, and Entrada Formations in southeastern Colorado Green (1992) Kp Pierre Shale, undivided Green (1992) Kpg Pierre Shale, Niobrara, and Carlile, Greenhorn, and Graneros Formations, undivided Green (1992) Kvt Vermejo Formation (shale, sandstone, and major coal beds) and Trinidad Sandstone Green (1992) Qa Modern alluvium Green (1992) Tcu Cuchara Formation Green (1992) TKr Raton Formation Green (1992) Tpc Poison Canyon Formation Green (1992) dTcu Reported depth to top of Cuchara Formation USGS -9999 No data USGS 5 Assigned depth, in feet, where Cuchara Formation is uppermost geologic unit on geologic map (Green, 1992) USGS dTpc Reported depth to top of Poison Canyon Formation USGS -9999 No data USGS 5 Assigned depth, in feet, where Poison Canyon Formation is uppermost geologic unit on geologic map (Green, 1992) USGS dTKr Reported depth to top of Raton Formation USGS -9999 No data USGS 0 Assigned depth, in feet, where contact of Raton Formation with Poison Canyon Formation was interpolated from the geologic map of the Trinidad quadrangle (Johnson, 1969) USGS 5 Assigned depth, in feet, where Raton Formation is uppermost geologic unit on geologic map (Green, 1992 USGS 50 to 1780 Range of reported depths, in feet, to top of Raton Formation (coal), from the drilling report of the oil or gas well USGS dKv Reported depth to top of Vermejo Formation USGS -9999 No data USGS 0 Assigned depth, in feet, where contact of Veremjo Formation with Raton Formation was interpolated from the geologic map of the Trinidad quadrangle (Johnson, 1969) USGS 100 to 4702 Range of reported depths, in feet, to top of Vermejo Formation (coal), from the drilling report of the oil or gas well USGS dKt Reported depth to top of Trinidad Sandstone USGS -9999 No data USGS 0 Assigned depth, in feet, where contact of Trinidad Sandstone with Vermejo Formation was interpolated from the geologic map of the Trinidad quadrangle (Johnson, 1969) USGS 355 to 5016 Range of reported depths, in feet, to top of Trinidad Sandstone (bottom of Veremjo Formation), from the drilling report of the oil or gas well USGS dKp Reported depth to top of Pierre Shale (bottom of Trinidad Sandstone) USGS -9999 No data USGS 0 Assigned depth, in feet, where contact of Trinidad Sandstone with Pierre Shale was interpolated from the geologic map of the Trinidad quadrangle (Johnson, 1969) USGS 525 to 5290 Range of reported depths, in feet, to top of Pierre Shale (bottom of Trinidad Sandstone), from the drilling report of the oil or gas well USGS aTcu Calculated altitude of top of Cuchara Formation USGS -9999 No data USGS 7282 to 7792.68 Range of calculated altitudes, in feet, North American Vertical Datum 1988 (NAVD 88), aTcu = datum - dTcu USGS aTpc Calculated altitude of top of Poison Canyon Formation USGS -9999 No data USGS 6445 to 8721.56 Range of calculated altitudes, in feet, North American Vertical Datum 1988 (NAVD 88), aTpc = datum - dTpc USGS aTKr Calculated altitude of top of Raton Formation USGS -9999 No data USGS 6362.92 to 10250.4 Range of calculated altitudes, in feet, North American Vertical Datum 1988 (NAVD 88), aTKr = datum - dTKr USGS aTKr_flag Flag indicating use of attribute aTKr in geostatostical model USGS Yes Used in geostatistical model of altitude of the top of the Raton Formation USGS No Not used in geostatistical model of altitude of the top of the Raton Formation USGS aKv Calculated altitude of top of Vermejo Formation USGS -9999 No data USGS 2664.24 to 9202.69 Range of calculated altitudes, in feet, North American Vertical Datum 1988 (NAVD 88), aKv = datum - dKv USGS aKt Calculated altitude of top of Trinidad Sandstone USGS -9999 No data USGS 2350.24 to 10000 Range of calculated altitudes, in feet, North American Vertical Datum 1988 (NAVD 88), aKt = datum - dKt USGS aKt_flag Flag indicating use of attribute aKt in geostatostical model USGS Yes Used in geostatistical model of altitude of the top of the Trinidad Sandstone USGS No Not used in geostatistical model of altitude of the top of the Trinidad Sandstone USGS aKp Calculated altitude of bottom ofTrinidad Sandstone (top of Pierre Shale) USGS -9999 No data USGS 2076.24 to 10000 Range of calculated altitudes, in feet, North American Vertical Datum 1988 (NAVD 88), aKp - = datum - dKp USGS isoTpc Calculated apparent thickness of Poison Canyon Formation USGS -9999 No data USGS 45 to 1775 Range of calculated apparent thicknesses, in feet, isoTpc = dTKr - dTpc USGS isoTKr Calculated apparent thickness of Raton Formation USGS -9999 No data USGS 0 Assigned thickness at contact of Raton Formation with Veremjo Formation, in feet USGS 95 to 2144 Range of calculated apparent thicknesses, in feet, isoTKr = dKv - dTKr USGS isoKv Calculated apparent thickness of Vermejo Formation USGS -9999 No data USGS 0 Assigned thickness at contact of Veremjo Formation with Trinidad Sandstone, in feet USGS 65 to 590 Range of calculated apparent thicknesses, in feet, isoKv = dKt - dKv USGS isoKv_flag Flag indicating use of attribute isoKv in geostatostical model USGS Yes Used in geostatistical model of apparent thickness of Vermejo Formation USGS No Not used in geostatistical model of apparent thickness of Vermejo Formation USGS isoKt Calculated apparent thickness of Trinidad Sandstone USGS -9999 No data USGS 0 Assigned thickness at contact of Trinidad Sandstone with Pierre Shale, in feet USGS 31 to 340 Range of calculated apparent thicknesses, in feet, isoKt = dKp - dKt USGS isoKt_flag Flag indicating use of attribute isoKt in geostatostical model USGS Yes Used in geostatistical model of apparent thickness of Trinidad Sandstone USGS No Not used in geostatistical model of apparent thickness of Trinidad Sandstone USGS Remarks Remarks about data USGS Land-surface altitude not reported. Land-surface altitude was not reported for this location or the reported value was not within acceptable range USGS Location of contact interpolated from geologic map Altitude and location of hydrostratigraphic contact interpolated from geologic map (Johnson, 1969) USGS Questionable location, |datum error| > 25 feet. Questionable location, indicated by an absolute value for the attribute datum_err that was greater than 25 feet. USGS U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+sir-06-5129_formation_tops_point Downloadable Data Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. other no compression applied 0.042 http://water.usgs.gov/GIS/dsdl/SIR-06-5129_formation_tops_point.zip None. This data set is provided by the USGS as a public service. 20061013 20060929 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None Although this Federal Geographic Data Committee (FGDC) compliant metadata file is intended to document the data set in nonproprietary form, as well as Environmental Systems Research, Inc. (ESRI) ArcGIS format, this metadata file may include some ArcGIS-specific terminology. These data are not intended to be used as a survey product and are for reference purposes only. Acknowledgment of the U.S. Geological Survey and the Colorado Water Conservation Board would be appreciated in products derived from these data. Public Unclassified None http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile